Troubleshooting 3520C Lathe - Powermatic 3520C Operating Instructions And Parts Manual

13.0 Troubleshooting 3520C Lathe

Trouble
Motor fails to develop
full power.
Motor or spindle stalls
or will not start.
Excessive vibration.
Lathe runs at one
speed only.
Tools tend to grab or
dig in.
Headstock moves
when applying
pressure with
Tailstock.
Tailstock moves when
applying pressure.
Probable Cause
Power line overloaded.
Undersize wires in power supply
system.
Faulty inverter.
Worn motor.
Excessive cut.
Improper belt adjustment, or worn or
broken belt.
Improper cooling of motor.
Worn spindle bearings.
Worn motor.
Workpiece warped, out of round, has
major flaw, or was improperly prepared
for turning.
Worn spindle bearings.
Worn drive belt.
Motor mount lock handle is loose.
Lathe on uneven surface.
Potentiometer faulty.
Electronic AC inverter is not
programmed properly, or is defective, or
there is loose wiring.
Dull tools.
Tool support set too low.
Tool support set too far from workpiece.
Improper tool being used.
Headstock not locked to bed.
Excessive pressure being applied by
tailstock (more than 500 lbs. of force).
Locking handle not tightened.
Cam lock nut needs adjusting.
Lathe bed and tailstock mating surfaces
are greasy or oily.
Remedy
Correct overload condition.
Increase supply wire size.
Contact Powermatic Technical Service.
Replace motor.
Reduce depth of cut.
Adjust or replace belt as needed.
Blow out sawdust from motor housing
fan.
Replace bearings.
Replace motor.
Correct problem by planing or sawing
workpiece, or discard entirely and use
new workpiece.
Replace spindle bearings.
Replace drive belt.
Tighten lock handle.
Adjust levelers.
Replace potentiometer.
Contact Powermatic Technical Service
to help identify problem; 800-274-6846.
Keep tools sharp.
Reposition tool support height.
Reposition tool support closer to
workpiece.
Use correct tool for operation.
Tighten headstock locking handle.
Slide headstock to the left end, then
apply pressure to workpiece with
tailstock. Apply only sufficient force with
tailstock to hold workpiece securely in
place.
Tighten locking handle.
Tighten cam lock nut.
Remove tailstock and clean surfaces
with a cleaner/degreaser. Re-apply light
coat of oil to bed surface.
Table 2
25